Trophic Groups Of Demersal Fish Of Santos Bay And Adjacent Continental Shelf, São Paulo State, Brazil: Temporal And Spatial Comparisons

Autor(es)

Elizabeti Y. Muto ^[1] ; Thaïs Navajas Corbisier ^[2] ; Leandro Inoe Coelho ^[1] ; Lidia Paes Leme Arantes ^[1] ; André Chalom ^[5] ; Lucy Satiko Hashimoto Soares ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Oceanog, BR-05508120 Sao Paulo - Brazil

^[2] Universidade de São Paulo. Instituto Oceanográfico - Brasil

^[3] Universidade de São Paulo. Instituto de Matemática e Estatística - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Oceanography; v. 62, n. 2, p. 89-102, 2014-07-00.

Resumo

The temporal and spatial variations of feeding habits and trophic groups of demersal fish species of Santos Bay and the adjacent continental shelf were investigated. The samples were taken in September 2005 and March 2006 by bottom otter trawling. The stomach content analysis of 2,328 specimens of 49 species showed most fish fed on a large range of food items but relied heavily on shrimp, crabs/swimming-crabs, amphipods, mysids, polychaetes, ophiuroids, squids, and teleosteans. The species were classified into ten trophic groups. Shrimp were an important food source in the Santos bay and inner shelf, while ophiuroids were important prey for predators of the middle shelf. Many species relied on crabs/swimming-crabs during the summer, especially on the middle shelf. The spatial and temporal variability in food resource utilization by fish were related to the pattern of distribution and abundance of their prey. The predation on shrimp and crabs/swimming-crabs seems to be related to the water mass dynamics of the region. Intraspecific comparisons demonstrated that most of the species display spatial and/or temporal variation in their diet. The demersal ichtyofauna can also be divided into the more general categories of piscivores, nektonic invertebrate feeders, benthic invertebrate feeders and planktonic invertebrate feeders. (AU)

• Processo FAPESP: 07/03252-0 - Papel trófico de Dactylopterus volitans (Linnaeus, 1758), na plataforma continental de Santos (SP), Brasil
• Beneficiário: Lídia Paes Leme Arantes
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 06/56974-0 - Estrutura e dinâmica trófica da ictiofauna demersal na Baía de Santos e plataforma adjacente (SP)
• Beneficiário: Elizabeti Yuriko Muto
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 03/09932-1 - A influência do complexo estuarino da Baixada Santista sobre o ecossistema da plataforma adjacente (ECOSAN)
• Beneficiário: Ana Maria Setubal Pires-Vanin
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático